Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Em qual ano o rubber as kickdrum pad estava disponível?
 ###Tabelas: CREATE TABLE available_drum_sets (available_drum_sets_id AUTO_INCREMENT PRIMARY KEY, DrumSet Name VARCHAR, Product Line VARCHAR, Years Available VARCHAR, Drum Module VARCHAR, KickDrum Pad VARCHAR, Snare Pad VARCHAR, Tom-Tom Pads VARCHAR, Hi-HatPad/ Controller VARCHAR, CrashandRide CymbalPads VARCHAR, DrumStand (oftenoptional) VARCHAR) CREATE TABLE race_results (race_results_id AUTO_INCREMENT PRIMARY KEY, Driver VARCHAR, Car # INT, Make VARCHAR, Points INT, Laps INT, Winnings VARCHAR) CREATE TABLE week_5:_august_6_and_7_2008 (week_5:_august_6_and_7_2008_id AUTO_INCREMENT PRIMARY KEY, Main contestant VARCHAR, Co-contestant (Yaar vs. Pyaar) VARCHAR, Date performed VARCHAR, Scores by each individual judge VARCHAR, Total score/week VARCHAR, Position VARCHAR, Status VARCHAR) CREATE TABLE list_of_counties (list_of_counties_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Irish name VARCHAR, County town VARCHAR, Most populous city/town VARCHAR, Province VARCHAR, Region VARCHAR) CREATE TABLE skyline (skyline_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Name VARCHAR, Height ft (m) VARCHAR, Floors (Stories) INT, Year Completed INT)  
SELECT Years Available FROM available_drum_sets WHERE KickDrum Pad = Rubber